(CNN) -- With at least $250 million at stake in Wednesday's Powerball drawing, there are hopeful ticket-buyers all across the United States. But Powerball is not a national lottery. In fact, most states don't offer it.

For details on how Powerball grew so big -- and so popular -- watch this report from CNN's Bob Cain.

RELATED VIDEO
CNN's Bob Cain on the history of the Powerball lottery
Windows Media	28K	56K